cc: Route offscreen context creation for compositor to the browser.

cc/thread_proxy.cc

 // Copyright 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/thread_proxy.h"
 
 #include "base/auto_reset.h"
 #include "base/bind.h"
 #include "base/debug/trace_event.h"
 #include "cc/delay_based_time_source.h"
 #include "cc/draw_quad.h"
 #include "cc/frame_rate_controller.h"
 #include "cc/input_handler.h"
 #include "cc/layer_tree_host.h"
 #include "cc/layer_tree_impl.h"
 #include "cc/output_surface.h"
 #include "cc/prioritized_resource_manager.h"
 #include "cc/scheduler.h"
 #include "cc/thread.h"
-#include "third_party/WebKit/Source/Platform/chromium/public/WebSharedGraphicsContext3D.h"
-
-using WebKit::WebSharedGraphicsContext3D;
+#include "ui/gl/context_provider.h"
 
 namespace {
 
 // Measured in seconds.
 const double contextRecreationTickRate = 0.03;
 
 // Measured in seconds.
 const double smoothnessTakesPriorityExpirationDelay = 0.25;
 
 }  // namespace
 
 namespace cc {
 
 scoped_ptr<Proxy> ThreadProxy::create(LayerTreeHost* layerTreeHost, scoped_ptr<Thread> implThread)
 {
     return make_scoped_ptr(new ThreadProxy(layerTreeHost, implThread.Pass())).PassAs<Proxy>();
 }
 
 ThreadProxy::ThreadProxy(LayerTreeHost* layerTreeHost, scoped_ptr<Thread> implThread)
     : Proxy(implThread.Pass())
     , m_animateRequested(false)
     , m_commitRequested(false)
     , m_commitRequestSentToImplThread(false)
+    , m_createdOffscreenContextProvider(false)
     , m_layerTreeHost(layerTreeHost)
     , m_rendererInitialized(false)
     , m_started(false)
     , m_texturesAcquired(true)
     , m_inCompositeAndReadback(false)
     , m_manageTilesPending(false)
     , m_weakFactoryOnImplThread(ALLOW_THIS_IN_INITIALIZER_LIST(this))
     , m_weakFactory(ALLOW_THIS_IN_INITIALIZER_LIST(this))
     , m_beginFrameCompletionEventOnImplThread(0)
     , m_readbackRequestOnImplThread(0)
@@ skipping 165 matching lines @@
 
 bool ThreadProxy::recreateOutputSurface()
 {
     TRACE_EVENT0("cc", "ThreadProxy::recreateOutputSurface");
     DCHECK(isMainThread());
 
     // Try to create the surface.
     scoped_ptr<OutputSurface> outputSurface = m_layerTreeHost->createOutputSurface();
     if (!outputSurface.get())
         return false;
-    if (m_layerTreeHost->needsSharedContext())
-        if (!WebSharedGraphicsContext3D::createCompositorThreadContext())
+    scoped_refptr<ui::ContextProvider> offscreenContextProvider;
+    if (m_createdOffscreenContextProvider) {
+        offscreenContextProvider = m_layerTreeHost->client()->OffscreenContextProviderForCompositorThread();
+        if (!offscreenContextProvider->InitializeOnMainThread())
             return false;
+    }
 
     // Make a blocking call to recreateOutputSurfaceOnImplThread. The results of that
     // call are pushed into the recreateSucceeded and capabilities local
     // variables.
     CompletionEvent completion;
     bool recreateSucceeded = false;
     RendererCapabilities capabilities;
     DebugScopedSetMainThreadBlocked mainThreadBlocked(this);
     Proxy::implThread()->postTask(base::Bind(&ThreadProxy::recreateOutputSurfaceOnImplThread,
                                              m_implThreadWeakPtr,
                                              &completion,
                                              base::Passed(&outputSurface),
+                                             offscreenContextProvider,
                                              &recreateSucceeded,
                                              &capabilities));
     completion.wait();
 
     if (recreateSucceeded)
         m_RendererCapabilitiesMainThreadCopy = capabilities;
     return recreateSucceeded;
 }
 
 void ThreadProxy::renderingStats(RenderingStats* stats)
@@ skipping 51 matching lines @@
     TRACE_EVENT0("cc", "ThreadProxy::didLoseOutputSurfaceOnImplThread");
     Proxy::implThread()->postTask(base::Bind(&ThreadProxy::checkOutputSurfaceStatusOnImplThread, m_implThreadWeakPtr));
 }
 
 void ThreadProxy::checkOutputSurfaceStatusOnImplThread()
 {
     DCHECK(isImplThread());
     TRACE_EVENT0("cc", "ThreadProxy::checkOutputSurfaceStatusOnImplThread");
     if (!m_layerTreeHostImpl->isContextLost())
         return;
+    if (ui::ContextProvider* offscreenContexts = m_layerTreeHostImpl->resourceProvider()->offscreenContextProvider())
+        offscreenContexts->VerifyContexts();
     m_schedulerOnImplThread->didLoseOutputSurface();
 }
 
 void ThreadProxy::onSwapBuffersCompleteOnImplThread()
 {
     DCHECK(isImplThread());
     TRACE_EVENT0("cc", "ThreadProxy::onSwapBuffersCompleteOnImplThread");
     m_schedulerOnImplThread->didSwapBuffersComplete();
     Proxy::mainThread()->postTask(base::Bind(&ThreadProxy::didCompleteSwapBuffers, m_mainThreadWeakPtr));
 }
@@ skipping 265 matching lines @@
     if (!m_layerTreeHost)
         return;
 
     if (m_deferCommits) {
         m_pendingDeferredCommit = beginFrameState.Pass();
         m_layerTreeHost->didDeferCommit();
         TRACE_EVENT0("cc", "EarlyOut_DeferCommits");
         return;
     }
 
-    if (m_layerTreeHost->needsSharedContext() && !WebSharedGraphicsContext3D::haveCompositorThreadContext())
-        WebSharedGraphicsContext3D::createCompositorThreadContext();
-
     // Do not notify the impl thread of commit requests that occur during
     // the apply/animate/layout part of the beginFrameAndCommit process since
     // those commit requests will get painted immediately. Once we have done
     // the paint, m_commitRequested will be set to false to allow new commit
     // requests to be scheduled.
     m_commitRequested = true;
     m_commitRequestSentToImplThread = true;
 
     // On the other hand, the animationRequested flag needs to be cleared
     // here so that any animation requests generated by the apply or animate
@@ skipping 49 matching lines @@
     // false. If it is true now, it means setNeedAnimate was called again, but
     // during a state when m_commitRequestSentToImplThread = true. We need to
     // force that call to happen again now so that the commit request is sent to
     // the impl thread.
     if (m_animateRequested) {
         // Forces setNeedsAnimate to consider posting a commit task.
         m_animateRequested = false;
         setNeedsAnimate();
     }
 
+    scoped_refptr<ui::ContextProvider> offscreenContextProvider;
+    if (m_RendererCapabilitiesMainThreadCopy.usingOffscreenContext3d && m_layerTreeHost->needsOffscreenContext()) {
+        offscreenContextProvider = m_layerTreeHost->client()->OffscreenContextProviderForCompositorThread();
+        if (offscreenContextProvider->InitializeOnMainThread())
+            m_createdOffscreenContextProvider = true;
+        else
+            offscreenContextProvider = NULL;
+    }
+
     // Notify the impl thread that the beginFrame has completed. This will
     // begin the commit process, which is blocking from the main thread's
     // point of view, but asynchronously performed on the impl thread,
     // coordinated by the Scheduler.
     {
         TRACE_EVENT0("cc", "commit");
 
         DebugScopedSetMainThreadBlocked mainThreadBlocked(this);
 
         base::TimeTicks startTime = base::TimeTicks::HighResNow();
         CompletionEvent completion;
-        Proxy::implThread()->postTask(base::Bind(&ThreadProxy::beginFrameCompleteOnImplThread, m_implThreadWeakPtr, &completion, queue.release()));
+        Proxy::implThread()->postTask(base::Bind(&ThreadProxy::beginFrameCompleteOnImplThread, m_implThreadWeakPtr, &completion, queue.release(), offscreenContextProvider));
         completion.wait();
         base::TimeTicks endTime = base::TimeTicks::HighResNow();
 
         m_totalCommitTime += endTime - startTime;
         m_totalCommitCount++;
     }
 
     m_layerTreeHost->commitComplete();
     m_layerTreeHost->didBeginFrame();
 }
 
-void ThreadProxy::beginFrameCompleteOnImplThread(CompletionEvent* completion, ResourceUpdateQueue* rawQueue)
+void ThreadProxy::beginFrameCompleteOnImplThread(CompletionEvent* completion, ResourceUpdateQueue* rawQueue, scoped_refptr<ui::ContextProvider> offscreenContextProvider)
 {
     scoped_ptr<ResourceUpdateQueue> queue(rawQueue);
 
     TRACE_EVENT0("cc", "ThreadProxy::beginFrameCompleteOnImplThread");
     DCHECK(!m_commitCompletionEventOnImplThread);
     DCHECK(isImplThread() && isMainThreadBlocked());
     DCHECK(m_schedulerOnImplThread);
     DCHECK(m_schedulerOnImplThread->commitPending());
 
     if (!m_layerTreeHostImpl.get()) {
         TRACE_EVENT0("cc", "EarlyOut_NoLayerTree");
         completion->signal();
         return;
     }
 
+    m_layerTreeHostImpl->resourceProvider()->setOffscreenContextProvider(offscreenContextProvider);
+
     if (m_layerTreeHost->contentsTextureManager()->linkedEvictedBackingsExist()) {
         // Clear any uploads we were making to textures linked to evicted
         // resources
         queue->clearUploadsToEvictedResources();
         // Some textures in the layer tree are invalid. Kick off another commit
         // to fill them again.
         setNeedsCommitOnImplThread();
     }
 
     m_layerTreeHost->contentsTextureManager()->pushTexturePrioritiesToBackings();
 
-    m_currentResourceUpdateControllerOnImplThread = ResourceUpdateController::create(this, Proxy::implThread(), queue.Pass(), m_layerTreeHostImpl->resourceProvider(), hasImplThread());
+    m_currentResourceUpdateControllerOnImplThread = ResourceUpdateController::create(this, Proxy::implThread(), queue.Pass(), m_layerTreeHostImpl->resourceProvider());
     m_currentResourceUpdateControllerOnImplThread->performMoreUpdates(
         m_schedulerOnImplThread->anticipatedDrawTime());
 
     m_commitCompletionEventOnImplThread = completion;
 }
 
 void ThreadProxy::beginFrameAbortedOnImplThread()
 {
     TRACE_EVENT0("cc", "ThreadProxy::beginFrameAbortedOnImplThread");
     DCHECK(isImplThread());
@@ skipping 317 matching lines @@
 {
     DCHECK(isImplThread());
     m_layerTreeHostImpl->setFullRootLayerDamage();
 }
 
 size_t ThreadProxy::maxPartialTextureUpdates() const
 {
     return ResourceUpdateController::maxPartialTextureUpdates();
 }
 
-void ThreadProxy::recreateOutputSurfaceOnImplThread(CompletionEvent* completion, scoped_ptr<OutputSurface> outputSurface, bool* recreateSucceeded, RendererCapabilities* capabilities)
+void ThreadProxy::recreateOutputSurfaceOnImplThread(CompletionEvent* completion, scoped_ptr<OutputSurface> outputSurface, scoped_refptr<ui::ContextProvider> offscreenContextProvider, bool* recreateSucceeded, RendererCapabilities* capabilities)
 {
     TRACE_EVENT0("cc", "ThreadProxy::recreateOutputSurfaceOnImplThread");
     DCHECK(isImplThread());
     m_layerTreeHost->deleteContentsTexturesOnImplThread(m_layerTreeHostImpl->resourceProvider());
     *recreateSucceeded = m_layerTreeHostImpl->initializeRenderer(outputSurface.Pass());
     if (*recreateSucceeded) {
         *capabilities = m_layerTreeHostImpl->rendererCapabilities();
+        m_layerTreeHostImpl->resourceProvider()->setOffscreenContextProvider(offscreenContextProvider);
         m_schedulerOnImplThread->didRecreateOutputSurface();
     }
     completion->signal();
 }
 
 void ThreadProxy::renderingStatsOnImplThread(CompletionEvent* completion, RenderingStats* stats)
 {
     DCHECK(isImplThread());
     m_layerTreeHostImpl->renderingStats(stats);
     completion->signal();
@@ skipping 132 matching lines @@
 
 void ThreadProxy::renewTreePriorityOnImplThread()
 {
     DCHECK(m_renewTreePriorityOnImplThreadPending);
     m_renewTreePriorityOnImplThreadPending = false;
 
     renewTreePriority();
 }
 
 }  // namespace cc